Verify a signed PDF

Anyone can check a document signed with Sovrasign: signers, senders, or someone who receives the PDF years later.

1. Open Sovrasign Verify, the verifier built on Sovrasign's own signing engine.
2. Drop the signed PDF on the page ("Drop a signed PDF here, or choose a file"); on a phone, choose Choose a signed PDF.
3. Read the result at the top. Read a verification report explains each line.

The file stays on your device. The check runs in your browser; the PDF is not uploaded to Sovrasign or anyone else.

Check the right file

Check the PDF you received by email or downloaded, not a printout or a scan. A printout keeps how the signatures look but loses the evidence. If you edit and save the PDF, even only to add a note, the check reports a change.

Check it yourself

Check it yourself opens Sovrasign Verify on the PDF you are looking at, in a new tab, without saving or uploading it:

• on the signing page, after you sign;
• on the page the "Completed:" email links to, where you download the signed copy;
• on the sender's envelope page, under Verification, which also shows what Sovrasign's own check found.

If the new tab says the page you came from did not send the PDF, choose the file you saved instead.

The trust list

To confirm who signed, the verifier needs to know the keys of the sign-in providers (Google, Microsoft, Apple and Sovrasign's own email-code and sender services). That list is the trust list. Sovrasign Verify starts with Sovrasign's published list: Sovrasign signs it, so other verifiers built on the same engine can use it too and check where it came from. Under Technical details and trust list you can see the providers, fetch their current keys, or load another list. Never load a trust list because the sender of a document asks you to: a false list could make a forged signature look genuine.